I am currently preparing for ZIO. While I was going through some past papers I came across a problem from ZIO 2014(Q.3) It contains a keypad(3*3 grid) with numbers 1 to 9. I have the first number and the total no. of digits. I need to find the number of possible keycodes. Note: we can only move to a number adjacent to the number we have currently typed in.

Hello my name is Souparno Adhikari and this is my first time in ICO. I am from 10th standard. ZIO is not far away. It will be held on 18th November, i.e. this Saturday. Can someone plz tell me about some tips and tricks to crack ZIO and tell me about the important topics ?